1. What is Sodium Sulfide (Na₂S)?

Sodium sulfide is an inorganic chemical compound with the formula Na₂S. It's a colorless water-soluble salt that gives strongly alkaline solutions. It's used in the pulp and paper industry, water treatment, and chemical manufacturing.

2. How is Molar Mass Calculated?

The molar mass is calculated using the formula:

Where:

• Atomic Mass of Na (Sodium) = 22.99 g/mol
• Atomic Mass of S (Sulfur) = 32.065 g/mol

Calculation: (2 × 22.99) + 32.065 = 78.045 g/mol

3. Importance of Molar Mass Calculation

Details: Knowing the molar mass is essential for stoichiometric calculations, preparing solutions with specific concentrations, and chemical reaction balancing.

4. Using the Calculator

Tips: This calculator uses standard atomic weights. For precise calculations, use the exact isotopic composition of your sample.

5. Frequently Asked Questions (FAQ)

Q1: Why are the atomic mass values fixed?
A: Standard atomic weights are used for general calculations. For precise work, exact isotopic composition may be needed.

Q2: What's the difference between molar mass and molecular weight?
A: Molar mass is the mass of one mole of substance (g/mol), while molecular weight is the mass of one molecule (in atomic mass units).

Q3: How does temperature affect molar mass?
A: Molar mass is temperature-independent as it's based on atomic masses, though measured mass may vary slightly with isotopic composition.

Q4: Can I calculate molar mass for other compounds with this?
A: This calculator is specific for Na₂S. The formula would differ for other compounds.

Q5: Why is the molar mass important in chemistry?
A: It's crucial for converting between mass and moles, preparing solutions, and stoichiometric calculations in chemical reactions.